'嗦油' (suō yóu) is a vivid, colloquial noun derived from the image of a dog greedily licking oil off a surface — '嗦' mimics the slurping sound, while '油' means 'oil', symbolizing something rich, valuable, or desirable. Together, they metaphorically describe the act of exploiting resources, siphoning benefits, or profiting unfairly — often at others’ expense — with an implication of sneakiness, excess, or moral looseness.

This slang originated in internet and youth vernacular, especially in online discussions about corruption, corporate overreach, or social inequality. It carries strong informal and slightly mocking or critical connotations, rarely used in formal writing or polite conversation. While rooted in animal behavior, it functions purely as figurative language — no actual dogs or oil are involved in modern usage. The term is frequently paired with verbs like '在...嗦油' ('sucking oil from...') or nouns like '嗦油行为' ('exploitative behavior').